Consider getting at least one T7 Yellow Luck gem for each character. They cost 35 Clover, 180 GS or a combination of the two (1 Clover costs 5 GS if you buy it from Majerio's shop) so they are equivalent to a Tier 7 Gem bought from the Black Market.

The Gem's Luck percentage is equal to 1 rank per 6.25 Tier of Gear if placed in Chest, Ring, Amulet or 2h Weapon. Ex: a Tier 7 Ring would give you +0.56% Luck.Maximum +1.68%, or 3 ranks of Luck, in Tier 21 Ring or Amulet.

The Gem's Luck percentage is equal to 1 rank per 8.33 Tier of Gear if placed in Helm or Leg. Ex: a Tier 9 Helm would give you +0.54% Luck.Maximum of +1.26%, or 2.5 ranks of Luck, in Tier 21 Helm.

The Gem's Luck percentage is equal to 1 rank per 12.5 Tier of Gear if placed in Gauntlet, Boot, Off Hand Gear, 1h Weapon or Cloak. Ex: a Tier 13 Boot would give you +0.52% Luck.Maximum of +0.84% Luck, or 1.5 ranks of Luck, in Tier 21 Cloak.

MY PERSONAL OPINIONLucky Gems let you increase your Luck rating, without using an Amulet, Ring or Cloak enchant slot. This allows you to use both enchant slots for damage bonus enchants. Currently no other gem acts like an enchant, so it is like getting bonus enchant slots (depending on what you are giving up by putting a Lucky Gem in that gem slot).

If buying a Luck Gem, the Tier 7 Haste Gems are a good buy. Tier 7 Haste Gems are already near the top of the curve due to the way Haste is calculated. If you get a Lucky Haste Gem the difference in combat effectiveness at Level 40 between it and a Tragick Haste Gem or Tier 8 Haste Gem will be smaller than a Lucky Crit gem or Lucky Dodge gem. As a general rule, the biggest loss in combat effectiveness at Level 40 will be between a Lucky Dodge gem and a Tragick Dodge gem or Tier 8 Dodge gem.

As a bonus, moving gems around is free, while moving a luck enchant to new gear costs enchant materials or GS.

Note 1)With Halloween and TVal moving to raids in 2017, Luck is still useful in Halloween and TVal, but does not affect candy earned (candy corn or candy hearts).

Luck enchants at Rank 1 on 3 items (3 Ranks total) or Rank 5 on 3 items (15 ranks total) are often a good investment since you normally have to spend enchant materials to increase it's rank and then enchant materials or GS to transfer an enchant:

Bj_Knows wrote:SubjectLuck Enchant, Rank 1 & Rank 5, Updated

Q: I want to get the Luck Enchant, at what Rank should I get it?

A: That is a very complex question. It depends on how you play BoH.

Lower level characters get extra Loot Drops during some Seasonal Events. Ex: Energy Potions during HoliGob, Shards during TVal, Food during Were Chef, Candy Corn during Halloween Undead Invasion. But no extra Loot Drops for other Seasonal Events. Ex: LuckyF and TLaPD are Raid based so you don’t really get an advantage from Luck Enchant.

Farming Gem Shards and Whole Gems get extra Loot Drops. You only need 1,500 Tier 4 Shards for Karnak’s Ring, so depending on how much of a hurry you are in it may, or may not, make a difference. I don’t know if it affects Keeper Shards or Impure Shadows. Venan may add other desirable PvE Loot Drops in the future that are affected by Luck Enchant.

Using GS to buy a Transfer Plate, Luck rank 3, from the Black Market may be worth it, for cash players, since the Black Market only sells so much Essence, and Flux, per week.

Bj_Knows wrote:Rank 1 & Rank 5 LuckIf you are positive you are going to Enchant 18+ Slots to Rank 6, three items with Rank 1 Luck (total 1.5%), has a very positive ROI. If you are going to Enchant 18+ Slots to Rank 9, three items with Rank 5 Luck (total 7.5%), has a very positive ROI.